CN109346012A - Pixel-driving circuit and display device - Google Patents
Pixel-driving circuit and display device Download PDFInfo
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- CN109346012A CN109346012A CN201811483205.4A CN201811483205A CN109346012A CN 109346012 A CN109346012 A CN 109346012A CN 201811483205 A CN201811483205 A CN 201811483205A CN 109346012 A CN109346012 A CN 109346012A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
Abstract
The present invention provides a kind of pixel-driving circuit and display device.The pixel-driving circuit includes the light emitting module to insmod, with the compensating module of the electric connection that insmods and with compensating module electric connection；It is described to insmod for receiving reset signal and luminous signal, and to compensating module input initialization signal under the control of reset signal, to compensating module input data signal under the control of luminous signal；For receiving scanning signal, and under the control of scanning signal, reception power supply high voltage carries out the compensation of threshold voltage to the compensating module；The light emitting module is for receiving luminous signal, and power supply high voltage is received under the control of luminous signal and is shone, and light emission luminance can be adjusted by changing the size of power supply high voltage, the pixel-driving circuit can not only effective compensation threshold power, light emission luminance is also adjusted by power supply high voltage, and structure is simple, it is easily fabricated.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of pixel-driving circuit and display devices.
Background technique
Organic Light Emitting Diode (Organic Light Emitting Display, OLED) display device has spontaneous
Light, driving voltage are low, luminous efficiency is high, the response time is short, clarity and contrast are high, nearly 180 ° of visual angles, use temperature ranges
Width is known as being the display for most having development potentiality by industry, it can be achieved that many advantages, such as Flexible Displays are with large area total colouring
Device.
OLED display according to driving method can be divided into passive matrix OLED (Passive Matrix OLED,
) and active array type OLED (Active Matrix OLED, AMOLED) two major classes, i.e. directly addressing and film crystal PMOLED
Manage two class of (Thin Film Transistor, TFT) matrix addressing.Wherein, AMOLED has the pixel in array arrangement, belongs to
In active display type, luminous efficacy is high, is typically used as large scale display device high-definition.AMOLED is current driver
Part, when there is electric current to flow through Organic Light Emitting Diode, organic light-emitting diode, and light emission luminance is by flowing through organic light emission two
The electric current of pole pipe itself determines.Most of existing integrated circuit (Integrated Circuit, IC) all only believe by transmission voltage
Number, therefore the task that the pixel-driving circuit of AMOLED needs to complete for voltage signal to be changed into current signal.
As shown in Figure 1, a kind of existing pixel-driving circuit includes: first film transistor T10, the second thin film transistor (TFT)
T20, third thin film transistor (TFT) T30, the 4th thin film transistor (TFT) T40, the 5th thin film transistor (TFT) T50, the 6th thin film transistor (TFT) T60,
The grid of storage capacitance C10 and Organic Light Emitting Diode D10, the first film transistor T10 receive scanning signal Gate, source
Pole is electrically connected first node A0, and drain electrode is electrically connected second node B0；The grid of the second thin film transistor (TFT) T20 electrically connects
First node A0 is met, drain electrode receives power supply high voltage Vdd, and source electrode is electrically connected second node B0；The third thin film transistor (TFT)
The grid of T30 receives luminous signal EM, and source electrode receives data-signal Data, and drain electrode is electrically connected third node C0；Described 4th
The grid of thin film transistor (TFT) T40 receives luminous signal EM, and source electrode is electrically connected second node B0, and drain electrode is electrically connected organic shine
The anode of diode D1；The grid of the 5th thin film transistor (TFT) T50 receives luminous signal EM, and source electrode receives reference signal Ref,
Drain electrode is electrically connected third node C0；The grid of the 6th thin film transistor (TFT) T60 receives reset signal Reset, and source electrode receives
Initializing signal Int, drain electrode are electrically connected first node A0；The first end of the storage capacitance C10 is electrically connected first node
A0, second end are electrically connected third node C0；The cathode of the Organic Light Emitting Diode D1 receives power supply low-voltage Vss, the picture
The light emission luminance of plain driving circuit can be not only adjusted by data-signal Data to be carried out by reference to signal Ref
Adjustment, but for input reference signal Ref, it needs additionally to increase by a signal line in the pixel-driving circuit, causes pixel
Structure is complicated for driving circuit, and manufacturing process difficulty increases.
Summary of the invention
The purpose of the present invention is to provide a kind of pixel-driving circuits, can adjust light emission luminance by power supply high voltage,
And structure is simple, it is easily fabricated.
The object of the invention is also to provide a kind of display devices, and light emission luminance can be adjusted by power supply high voltage, and
Structure is simple, easily fabricated.
To achieve the above object, the present invention provides a kind of pixel-driving circuit, including insmods, insmods with described
The compensating module of electric connection and the light emitting module being electrically connected with the compensating module；
It is described to insmod for receiving reset signal and luminous signal, and to compensating module under the control of reset signal
Input initialization signal, to compensating module input data signal under the control of luminous signal；
The compensating module receives power supply high voltage under the control of scanning signal and carries out threshold for receiving scanning signal
The compensation of threshold voltage；
Reception power supply high voltage is concurrent for receiving luminous signal, and under the control of luminous signal for the light emitting module
Light, and light emission luminance can be adjusted by changing the size of power supply high voltage.
The compensating module includes first film transistor, the second thin film transistor (TFT) and storage capacitance；
The grid of the first film transistor receives scanning signal, and source electrode is electrically connected first node, and drain electrode electrically connects
Connect second node；
The grid of second thin film transistor (TFT) is electrically connected first node, and drain electrode receives power supply high voltage, and source electrode is electrical
Connect second node；
The first end of the storage capacitance is electrically connected first node, and second end is electrically connected third node；
Described insmod is electrically connected the first node and third node, and the light emitting module is electrically connected described the
Two nodes and third node.
The light emitting module includes: third thin film transistor (TFT), the 4th thin film transistor (TFT) and Organic Light Emitting Diode；
The grid of the third thin film transistor (TFT) receives luminous signal, and source electrode receives power supply high voltage, and drain electrode is electrically connected
Third node；
The grid of 4th thin film transistor (TFT) receives luminous signal, and source electrode is electrically connected second node, and drain electrode electrically connects
Connect the anode of Organic Light Emitting Diode；
The cathode of the Organic Light Emitting Diode receives power supply low-voltage.
Described insmod includes: the 5th thin film transistor (TFT) and the 6th thin film transistor (TFT)；
The grid of 5th thin film transistor (TFT) receives luminous signal, and source electrode receives data-signal, and drain electrode is electrically connected the
Three nodes；
The grid of 6th thin film transistor (TFT) receives reset signal, and source electrode receives initializing signal, and drain electrode is electrically connected
First node.
The first film transistor, the second thin film transistor (TFT), third thin film transistor (TFT), the 4th thin film transistor (TFT) and the 6th
Thin film transistor (TFT) is P-type TFT, and the 5th thin film transistor (TFT) is N-type TFT.
The course of work of the pixel-driving circuit successively includes loading stage, compensated stage and light emitting phase；
In the stage of loading, the reset signal is low potential, and scanning signal and luminous signal are high potential；
In compensated stage, the scanning signal is low potential, and the reset signal and luminous signal are high potential；
In light emitting phase, the luminous signal is low potential, and the scanning signal and reset signal are high potential.
In the stage of loading, the voltage of the first node is Vint, and the voltage of the third node is Vdata, wherein
Vint is the voltage of initializing signal, and Vdata is the voltage of data-signal.
In compensated stage, the voltage of the first node is Vdd- | Vth |, the voltage of the second node is Vdd, described
The voltage of third node is Vdata, and wherein Vth is the threshold voltage of the second thin film transistor (TFT), and Vdd is power supply high voltage, Vdata
For the voltage of data-signal.
In light emitting phase, the voltage of the first node is Vdd- | Vth |-Vdata+Vdd, the voltage of the second node
For Vdd, the voltage of the third node is Vdd, and wherein Vth is the threshold voltage of the second thin film transistor (TFT), and Vdd is the high electricity of power supply
Pressure, Vdata are the voltage of data-signal.
The present invention also provides a kind of display devices, including above-mentioned pixel-driving circuit.
Beneficial effects of the present invention: the present invention provides a kind of pixel-driving circuit, including insmod, with the loading mould
The compensating module that block is electrically connected and the light emitting module being electrically connected with the compensating module；It is described to insmod for receiving again
Position signal and luminous signal, and to compensating module input initialization signal under the control of reset signal, in the control of luminous signal
To compensating module input data signal under system；The compensating module is used to receive scanning signal, and under the control of scanning signal
Receive the compensation that power supply high voltage carries out threshold voltage；The light emitting module is used to receive luminous signal, and in luminous signal
Control is lower to be received power supply high voltage and shines, and light emission luminance can be adjusted by changing the size of power supply high voltage, should
Pixel-driving circuit can not only effective compensation threshold power, light emission luminance is also adjusted by power supply high voltage, and structure is simple,
It is easily fabricated.The present invention also provides a kind of display device, light emission luminance can be adjusted by power supply high voltage, and structure is simple,
It is easily fabricated.
Detailed description of the invention
For further understanding of the features and technical contents of the present invention, it please refers to below in connection with of the invention detailed
Illustrate and attached drawing, however, the drawings only provide reference and explanation, is not intended to limit the present invention.
In attached drawing,
Fig. 1 is the circuit diagram of existing pixel-driving circuit；
Fig. 2 is the schematic diagram of pixel-driving circuit of the invention；
Fig. 3 is the circuit diagram of pixel-driving circuit of the invention；
Fig. 4 is the working waveform figure of pixel-driving circuit of the invention.
Specific embodiment
Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention
Example and its attached drawing are described in detail.
Please see Fig. 2 to Fig. 4, the present invention provides a kind of pixel-driving circuit, including insmod 1 and the loading mould
The compensating module 2 that block 1 is electrically connected and the light emitting module 3 being electrically connected with the compensating module 2；
It is described to insmod 1 for receiving reset signal Reset and luminous signal EM, and in the control of reset signal Reset
To 2 input initialization signal Int of compensating module under system, to 2 input data signal of compensating module under the control of luminous signal EM
Data；
The compensating module 2 receives power supply height for receiving scanning signal Gate under the control of scanning signal Gate
The compensation of voltage Vdd progress threshold voltage；
The light emitting module 3 receives power supply high voltage for receiving luminous signal EM under the control of luminous signal EM
Vdd simultaneously shines, and light emission luminance can be adjusted by changing the size of power supply high voltage Vdd.
Specifically, as shown in figure 3, in a specific embodiment of the present invention, the compensating module 2 includes the first film crystal
Pipe T1, the second thin film transistor (TFT) T2 and storage capacitance C1；
The grid of the first film transistor T1 receives scanning signal Gate, and source electrode is electrically connected first node A, drain electrode
It is electrically connected second node B；
The grid of the second thin film transistor (TFT) T2 is electrically connected first node A, and drain electrode receives power supply high voltage Vdd, source
Pole is electrically connected second node B；
The first end of the storage capacitance C1 is electrically connected first node A, and second end is electrically connected third node C；
1 electric connection that the insmods first node A and third node C, the electric connection of light emitting module 3 institute
State second node B and third node C.
Further, in a specific embodiment of the present invention, the light emitting module 3 includes: third thin film transistor (TFT) T3,
Four thin film transistor (TFT) T4 and Organic Light Emitting Diode D1；
The grid of the third thin film transistor (TFT) T3 receives luminous signal EM, and source electrode receives power supply high voltage, and drain electrode is electrically
Connect third node C；
The grid of the 4th thin film transistor (TFT) T4 receives luminous signal EM, and source electrode is electrically connected second node B, drain electrode electricity
Property connection Organic Light Emitting Diode D1 anode；
The cathode of the Organic Light Emitting Diode D1 receives power supply low-voltage Vss.
Further, in a specific embodiment of the present invention, it is described insmod 1 include: the 5th thin film transistor (TFT) T5 and
6th thin film transistor (TFT) T6；
The grid of the 5th thin film transistor (TFT) T5 receives luminous signal EM, and source electrode receives data-signal Data, drain electrode electricity
Property connection third node C；
The grid of the 6th thin film transistor (TFT) T6 receives reset signal Reset, and source electrode receives initializing signal Int, leakage
Pole is electrically connected first node A.
Specifically, in the present embodiment, the electroluminescent cell D1 is Organic Light Emitting Diode, and the first film is brilliant
Body pipe T1, the second thin film transistor (TFT) T2, third thin film transistor (TFT) T3, the 4th thin film transistor (TFT) T4, the 5th thin film transistor (TFT) T5 and
6th thin film transistor (TFT) T6 is amorphous silicon film transistor, low-temperature polysilicon film transistor or metal oxide semiconductor films
Transistor.
Preferably, in the present embodiment, the first film transistor T1, the second thin film transistor (TFT) T2, third film are brilliant
Body pipe T3, the 4th thin film transistor (TFT) T4 and the 6th thin film transistor (TFT) T6 are P-type TFT, are led under low level state
It is logical, end under high level state, the 5th thin film transistor (TFT) T5 is N-type TFT, it is connected under high level state,
End under low level state.
Specifically, the reset signal Reset, scanning signal Gate and luminous signal EM pass through external sequence controller
It provides.
It should be noted that referring to Fig. 4, the course of work of the pixel-driving circuit successively include the loading stage 10,
Compensated stage 20 and light emitting phase 30；
The loading stage 10, the reset signal Reset are low potential, and scanning signal Gate and luminous signal EM are height
Third node C is written in current potential, the data-signal Data described in the loading stage 10, and first node is written in initializing signal Int
A, the initializing signal are mono- low level signal of Int.
The compensated stage 20, the scanning signal Gate are low potential, the reset signal Reset and luminous signal EM
For high potential, in the compensated stage 20, second node B is written in the power supply high voltage Vdd, and the third node continues to write to
Data-signal Data, so that the voltage of first node A becomes the threshold voltage of power supply high voltage Vdd and the second thin film transistor (TFT) T2
The difference of the absolute value of (threshold voltage of P-type TFT is negative).
The light emitting phase 30, the luminous signal EM are low potential, the scanning signal Gate and reset signal Reset
For high potential, in light emitting phase 30, third node C is written in the power supply high voltage Vdd, so that first node A voltage changes therewith
Become, and Organic Light Emitting Diode D1 is driven to shine.
Please continue to refer to Fig. 4, and the course of work of the pixel-driving circuit is described in detail in conjunction with Fig. 2
Please refer to Fig. 2 and Fig. 4, be loaded into the stage 10, the reset signal Reset be low potential, scanning signal Gate and
Luminous signal EM is high potential, and the 6th thin film transistor (TFT) T6 and the 4th thin film transistor (TFT) T4 conducting, the first film are brilliant
Body pipe T1, third thin film transistor (TFT) T3 and the 5th thin film transistor (TFT) T5 cut-off, fourth film of the initializing signal Int through being connected are brilliant
First node A is written in body pipe T4, so that the voltage of first node A becomes Vint, sixth film of the data-signal Data through being connected
Third node C is written in transistor T6, so that the voltage of third node C becomes Vdata, wherein Vint is initializing signal Int's
Voltage, Vdata is the voltage of data-signal Data, and Vint is low level.
In compensated stage 20, the scanning signal Gate is low potential, and the reset signal Reset and luminous signal EM are
High potential, first node A are low level, the 6th thin film transistor (TFT) T6, the second thin film transistor (TFT) T2 and third film crystal
Pipe T3 conducting, the first film transistor T1, the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 cut-off, data-signal
Sixth thin film transistor (TFT) T6 of the Data through being connected continues to write to third node C, so that the voltage of third node C continues to remain
Vdata, power supply high voltage Vdd the second thin film transistor (TFT) T2 and third thin film transistor (TFT) T3 through being connected are first node A charging,
Until the difference of first node A and second node B is equal to the threshold voltage namely the first node of the second thin film transistor (TFT) T2
The voltage of A is Vdd- | Vth |, the voltage of the second node B is Vdd, and the voltage of storage capacitance C1 storage is Vdd-IVthI-
The voltage of Vdata, the third node C are Vdata, and wherein Vth is the threshold voltage of the second thin film transistor (TFT) T2；
In light emitting phase 30, the luminous signal EM is low potential, and the scanning signal Gate and reset signal Reset are
High potential, the first film transistor T1, the second thin film transistor (TFT) T2 and the 5th thin film transistor (TFT) T5 conducting, third film are brilliant
Body pipe T3, the 4th thin film transistor (TFT) T4 and the 6th thin film transistor (TFT) T6 cut-off, the power supply high voltage Vdd pass through the 5th of conducting
Third node C is written in thin film transistor (TFT) T5, and under the action of storage capacitance C1, the voltage of first node A is with third node C's
Variation and change, to keep the voltage stored in storage capacitance C1 constant namely the voltage of the first node A is Vdd- | Vth
| the voltage of-Vdata+Vdd, the second node B are Vdd, and the voltage of the third node C is Vdd
Flow through the electric current of Organic Light Emitting Diode D1 are as follows:
I=1/2 μ * COX*(W/L)*(|Vgs|-|Vth|)2
=1/2* μ * COX*(W/L)*[Vdd-(Vdd-|Vth|-Vdata+Vdd)-|Vth|]2
=1/2* μ * COX*(W/L)*(Vdd-Vdata)2
Wherein, μ is the carrier mobility of the second thin film transistor (TFT) T2, and Cox is the gate oxidation of the second thin film transistor (TFT) T2
Layer capacitance, W/L are the channel width-over-length ratio of the second thin film transistor (TFT) T2, and I is the electric current for flowing through Organic Light Emitting Diode D1, and Vgs is
The grid of second thin film transistor (TFT) T2 and the voltage difference of source electrode.
Accordingly it is found that flow through the threshold voltage vt h of the electric current I and the second thin film transistor (TFT) T2 of Organic Light Emitting Diode D1 without
It closes, shows bad problem so as to eliminate picture caused by the threshold voltage vt h change of the second thin film transistor (TFT) T2, and
And the electric current I of Organic Light Emitting Diode D1 is flowed through simultaneously by the voltage Vdata's of power supply high voltage Vdd and data-signal Data
It influences, therefore the electric current I for flowing through Organic Light Emitting Diode D1 can be by the electricity of change power supply high voltage Vdd and data-signal Data
Pressure Vdata is changed, so as to shining by the big minor adjustment Organic Light Emitting Diode D1 for changing power supply high voltage Vdd
Brightness promotes the flexibility of brightness regulation, and compared with the prior art, increases signal wire without additional, process difficulty is lower.
The present invention also provides a kind of display devices, including above-mentioned pixel-driving circuit.
In conclusion the present invention provides a kind of pixel-driving circuit, including insmods, electrically connects with described insmod
The compensating module connect and the light emitting module being electrically connected with the compensating module；It is described insmod for receive reset signal and
Luminous signal, and to compensating module input initialization signal under the control of reset signal, to benefit under the control of luminous signal
Repay module input data signal；The compensating module receives power supply under the control of scanning signal for receiving scanning signal
The compensation of high voltage progress threshold voltage；The light emitting module connects under the control of luminous signal for receiving luminous signal
It receives power supply high voltage and shines, and light emission luminance can be adjusted by changing the size of power supply high voltage, the pixel driver
Circuit can not only effective compensation threshold power, light emission luminance is also adjusted by power supply high voltage, and structure is simple, is easy to make
It makes.The present invention also provides a kind of display device, light emission luminance can be adjusted by power supply high voltage, and structure is simple, is easy to make
It makes.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology
Other various corresponding changes and modifications are made in design, and all these change and modification all should belong to the claims in the present invention
Protection scope.
Claims (10)
1. a kind of pixel-driving circuit, which is characterized in that including insmoding (1), with it is described insmod (1) electric connection
Compensating module (2) and the light emitting module (3) being electrically connected with the compensating module (2)；
Described insmod (1) is used to receive reset signal (Reset) and luminous signal (EM), and at reset signal (Reset)
Control under to compensating module (2) input initialization signal (Int), to compensating module (2) under the control of luminous signal (EM)
Input data signal (Data)；
The compensating module (2) receives power supply under the control of scanning signal (Gate) for receiving scanning signal (Gate)
The compensation of high voltage (Vdd) progress threshold voltage；
The light emitting module (3) receives the high electricity of power supply for receiving luminous signal (EM) under the control of luminous signal (EM)
Pressure (Vdd) simultaneously shines, and light emission luminance can be adjusted by changing the size of power supply high voltage (Vdd).
2. pixel-driving circuit as described in claim 1, which is characterized in that the compensating module (2) includes the first film crystalline substance
Body pipe (T1), the second thin film transistor (TFT) (T2) and storage capacitance (C1)；
The grid of the first film transistor (T1) receives scanning signal (Gate), and source electrode is electrically connected first node (A), leakage
Pole is electrically connected second node (B)；
The grid of second thin film transistor (TFT) (T2) is electrically connected first node (A), and drain electrode receives power supply high voltage (Vdd),
Source electrode is electrically connected second node (B)；
The first end of the storage capacitance (C1) is electrically connected first node (A), and second end is electrically connected third node (C)；
Described insmod (1) is electrically connected the first node (A) and third node (C), and the light emitting module (3) electrically connects
Connect the second node (B) and third node (C).
3. pixel-driving circuit as claimed in claim 2, which is characterized in that the light emitting module (3) includes: that third film is brilliant
Body pipe (T3), the 4th thin film transistor (TFT) (T4) and Organic Light Emitting Diode (D1)；
The grid of the third thin film transistor (TFT) (T3) receives luminous signal (EM), and source electrode receives power supply high voltage (Vdd), drain electrode
It is electrically connected third node (C)；
The grid of 4th thin film transistor (TFT) (T4) receives luminous signal (EM), and source electrode is electrically connected second node (B), drain electrode
It is electrically connected the anode of organic light emitting diode (D1)；
The cathode of the Organic Light Emitting Diode (D1) receives power supply low-voltage (Vss).
4. pixel-driving circuit as claimed in claim 3, which is characterized in that insmod (1) includes: the 5th film crystalline substance
Body pipe (T5) and the 6th thin film transistor (TFT) (T6)；
The grid of 5th thin film transistor (TFT) (T5) receives luminous signal (EM), and source electrode receives data-signal (Data), drain electrode
It is electrically connected third node (C)；
The grid of 6th thin film transistor (TFT) (T6) receives reset signal (Reset), and source electrode receives initializing signal (Int),
Drain electrode is electrically connected first node (A).
5. pixel-driving circuit as claimed in claim 4, which is characterized in that the first film transistor (T1), second thin
Film transistor (T2), third thin film transistor (TFT) (T3), the 4th thin film transistor (TFT) (T4) and the 6th thin film transistor (TFT) (T6) are p-type
Thin film transistor (TFT), the 5th thin film transistor (TFT) (T5) are N-type TFT.
6. pixel-driving circuit as claimed in claim 5, which is characterized in that the course of work of the pixel-driving circuit is successively
Including being loaded into stage (10), compensated stage (20) and light emitting phase (30)；
In the loading stage (10), the reset signal (Reset) is low potential, scanning signal (Gate) and luminous signal
It (EM) is high potential；
In the compensated stage (20), the scanning signal (Gate) is low potential, the reset signal (Reset) and the letter that shines
Number (EM) is high potential；
In the light emitting phase (30), the luminous signal (EM) is low potential, the scanning signal (Gate) and reset signal
It (Reset) is high potential.
7. pixel-driving circuit as claimed in claim 6, which is characterized in that be loaded into stage (10), the first node (A)
Voltage be Vint, the voltage of the third node (C) is Vdata, and wherein Vint is the voltage of initializing signal (Int),
Vdata is the voltage of data-signal (Data).
8. pixel-driving circuit as claimed in claim 6, which is characterized in that in compensated stage (20), the first node (A)
Voltage be Vdd- | Vth |, the voltage of the second node (B) is Vdd, and the voltage of the third node (C) is Vdata,
Middle Vth is the threshold voltage of the second thin film transistor (TFT) (T2), and Vdd is power supply high voltage, and Vdata is the electricity of data-signal (Data)
Pressure.
9. pixel-driving circuit as claimed in claim 6, which is characterized in that in light emitting phase (30), the first node (A)
Voltage be Vdd- | Vth |-Vdata+Vdd, the voltage of the second node (B) are Vdd, the voltage of the third node (C)
For Vdd, wherein Vth is the threshold voltage of the second thin film transistor (TFT) (T2), and Vdd is power supply high voltage, and Vdata is data-signal
(Data) voltage.
10. a kind of display device, which is characterized in that including pixel-driving circuit as described in any one of claim 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483205.4A CN109346012A (en) | 2018-12-05 | 2018-12-05 | Pixel-driving circuit and display device |
| PCT/CN2018/121848 WO2020113674A1 (en) | 2018-12-05 | 2018-12-18 | Pixel driving circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483205.4A CN109346012A (en) | 2018-12-05 | 2018-12-05 | Pixel-driving circuit and display device |
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| Publication Number | Publication Date |
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| CN109346012A true CN109346012A (en) | 2019-02-15 |
Family
ID=65297512
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811483205.4A Pending CN109346012A (en) | 2018-12-05 | 2018-12-05 | Pixel-driving circuit and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109346012A (en) |
| WO (1) | WO2020113674A1 (en) |
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| CN109671394A (en) * | 2019-02-21 | 2019-04-23 | 深圳市华星光电半导体显示技术有限公司 | OLED pixel driving circuit and OLED display |
| CN109935205A (en) * | 2019-04-02 | 2019-06-25 | 深圳市华星光电半导体显示技术有限公司 | The compensation method of pixel-driving circuit and pixel-driving circuit |
| WO2020199296A1 (en) * | 2019-04-04 | 2020-10-08 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and display panel |
| CN112992040A (en) * | 2021-04-13 | 2021-06-18 | 成都天马微电子有限公司 | Adjusting circuit and display device |
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| Publication number | Publication date |
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| WO2020113674A1 (en) | 2020-06-11 |
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